C5 glycolipids of heterocystous cyanobacteria track symbiont abundance in the diatom Hemiaulus hauckii across the tropical North Atlantic ...

• Main Authors: Bale, Nicole Jane, Villareal, Tracy A, Hopmans, Ellen C, Brussaard, Corina P D, Besseling, Marc, Dorhout, Denise J C, Sinninghe Damsté, Jaap S, Schouten, Stefan
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2018
• Subjects: NIOZ Royal Netherlands Institute for Sea Research, and Utrecht University NIOZ_UU; North Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.886399; https://doi.pangaea.de/10.1594/PANGAEA.886399

TS2Diatom-diazotroph associations (DDAs) include marine heterocystous cyanobacteria found as exosymbionts and endosymbionts in multiple diatom species. Heterocysts are the site of N2 fixation and have thickened cell walls containing unique heterocyst glycolipids which maintain a low oxygen environment within the heterocyst. The endosymbiotic cyanobacterium Richelia intracellularis found in species of the diatom genus Hemiaulus and Rhizosolenia makes heterocyst glycolipids (HGs) which are composed of C30 and C32 diols and triols with pentose (C5) moieties that are distinct from limnetic cyanobacterial HGs with predominantly hexose (C6) moieties. Here we applied a method for analysis of intact polar lipids to the study of HGs in suspended particulate matter (SPM) and surface sediment from across the tropical North Atlantic. The study focused on the Amazon plume region, where DDAs are documented to form extensive surface blooms, in order to examine the utility of C5 HGs as markers for DDAs as well as their ... : Supplement to: Bale, Nicole Jane; Villareal, Tracy A; Hopmans, Ellen C; Brussaard, Corina P D; Besseling, Marc; Dorhout, Denise J C; Sinninghe Damsté, Jaap S; Schouten, Stefan (2018): C5 glycolipids of heterocystous cyanobacteria track symbiont abundance in the diatom Hemiaulus hauckii across the tropical North Atlantic. Biogeosciences, 15, 1-13 ...